EP3194089A1 - Dispositif de pliage pour former simultanément une pluralité d'ondulations dans une tôle métallique et procédé d'utilisation du dispositif - Google Patents
Dispositif de pliage pour former simultanément une pluralité d'ondulations dans une tôle métallique et procédé d'utilisation du dispositifInfo
- Publication number
- EP3194089A1 EP3194089A1 EP15732770.1A EP15732770A EP3194089A1 EP 3194089 A1 EP3194089 A1 EP 3194089A1 EP 15732770 A EP15732770 A EP 15732770A EP 3194089 A1 EP3194089 A1 EP 3194089A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- punch
- folding
- upper frame
- metal sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 99
- 239000002184 metal Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims description 6
- 230000015572 biosynthetic process Effects 0.000 title description 11
- 239000011159 matrix material Substances 0.000 claims description 53
- 230000007704 transition Effects 0.000 claims description 19
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 230000000295 complement effect Effects 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims 2
- 239000012528 membrane Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000003949 liquefied natural gas Substances 0.000 description 4
- 238000004078 waterproofing Methods 0.000 description 4
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
- B21D13/02—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
- B21D13/10—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form into a peculiar profiling shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/025—Bulk storage in barges or on ships
- F17C3/027—Wallpanels for so-called membrane tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
Definitions
- the invention relates to a folding device for forming a plurality of corrugations in a metal sheet and a method of using the device.
- the invention relates more particularly to the field of tanks, waterproof and thermally insulating membranes, for the storage and / or transport of fluid, such as a cryogenic fluid; a corrugated metal sheet obtained by means of the folding device according to the invention being in particular intended for the construction of a sealed membrane of such a tank.
- corrugated waterproofing membranes intended to form an internal coating for liquefied natural gas storage tanks.
- the sealing membrane consists of a plurality of metal plates having a series of perpendicular corrugations allowing it to deform under the effect of thermal and mechanical stresses generated by the fluid stored in the tank.
- corrugated waterproofing membrane is for example described in document KR100766309.
- the corrugated membrane comprises a first series of parallel corrugations, said high, extending in a first direction and a second series of parallel corrugations, said low, extending in a second direction perpendicular to the first.
- the formation of the high corrugations is first carried out, then, in a second step, the formation of the low corrugations and the node zones between the low and high corrugations.
- the document KR100766309 mentioned above provides for the high corrugations to be made by means of a folding device comprising a lower frame and an upper frame mounted vertically movable relative to the lower frame between a position rest and a folding position.
- the lower frame supports a matrix consisting of two matrix elements each having a half-cavity, movable between a spaced-apart position and a position close to one another in which the half-impressions of the two matrix elements together define an imprint corresponding to the shape of the undulation to be formed.
- the upper frame carries a punch intended to engage inside the impression so as to form the undulation, when the upper frame is in its folding position, and two clamps extending from on both sides of the punch and cooperating respectively with the one and the other of the matrix elements, when the upper frame moves towards its folding position, in order to maintain the metal sheet against the matrix elements so that the metal sheet remains in position during its folding.
- An idea underlying the invention is to provide a folding device that is simple and allows to simultaneously perform several corrugations in a metal sheet without changing the thickness of the sheet.
- the invention provides a folding device for simultaneously forming at least two parallel corrugations in a metal sheet, the folding device comprising:
- At least one first and one second matrix carried by the lower frame and each having an imprint parallel to the imprint of the other matrix and corresponding to the shape of one of the corrugations to be formed; the first die being fixed relative to the lower frame and the second die being slidably mounted on the lower frame in a direction transverse to the direction of the undulations to be formed between a spaced apart position and a close position of the first die; said second matrix being biased towards its position spaced by a return member; at least first and second parallel punches carried by the upper frame respectively above the first and second dies, the first punch being fixed relative to the upper frame and intended to engage inside the impression of the first die when the upper frame moves from its rest position to its folding position so as to press the metal sheet and the second punch is slidably mounted on the upper frame in a direction transverse to the direction of the corrugations to be formed between a spaced position and a close position of the first punch and being intended to engage inside the impression of the second die when the upper frame moves towards its folding position so as to press
- the folding device being arranged in such a way that, in operation, the displacement of the upper frame towards its folding position is able to cause a folding of the metal sheet between the first punch and the first die, on the one hand, and between the second punch and the second die, on the other hand, such that said metal sheet transmits a pulling force to the second punch and the second die which moves them from their spaced apart position to their close position.
- Such a folding device allows the simultaneous formation of several parallel corrugations without changing the thickness of the metal sheet.
- folding device is relatively simple. According to embodiments, such a folding device may comprise one or more of the following characteristics:
- the first and second dies each comprise two lateral elements and a central element; the lateral elements each having a lateral portion of the cavity of said first or second matrix and the central element comprising a central portion of the cavity of said first or second matrix, the central element being mounted vertically movable, between the elements lateral, between an upper position and a lower position and returned to its upper position by a return member so that, in operation, the displacement of the upper frame from its rest position to its folding position is able to pinch the sheet between the first and second punches and the central element of the corresponding first or second matrix and moving the central element from its upper position to its lower position.
- the return member of the central element is a gas spring or a helical spring.
- the lateral elements of the first and second dies each comprise a horizontal upper support surface for receiving the metal sheet and the first and second punches each comprise a head having a V-shaped portion having a shape complementary to that of the the imprint of the first or second matrix and two portions, for example two flanges, bordering the V portion, straightening towards the horizontal, and each coming opposite the horizontal upper bearing surface of one of the lateral elements of the first or the second matrix:
- the folding device comprises:
- first lower flank mounted on the lower frame between the first and second dies, and having a bearing surface for receiving the metal sheet; the first lower flank being slidably mounted on the lower frame in a direction transverse to the direction of the corrugations to be formed between a spaced apart position and a close position of the first die, the first lower flank being returned to its position spaced by a return member;
- a first upper flank mounted on the upper frame, between the first and second punches, above the first lower flank so as to allow clamping of the metal sheet between the first upper flank and the first flange;
- first lower flank when moving the upper frame from its rest position to its folding position, the first upper flank being slidably mounted on the upper frame in a direction transverse to the direction of the corrugations to be formed between a remote position and a close position of the first punch and returned to its position spaced by a return member;
- the folding device being arranged in such a way that, in operation, the displacement of the upper frame from its rest position to its folding position is able to cause a folding of the metal sheet between the first punch and the first die of such so that said metal sheet transmits a traction force to the first upper flank and the first lower flank which moves them from their spaced apart position to their close position.
- the first upper flank is mounted vertically movable on a support slidably mounted on the upper frame in the direction transverse to the direction of the undulations to be formed and the first upper flank is recalled at a distance from said support by a series of members of recall.
- the first upper flank is slidably mounted vertically on the associated support via guide tubes carried by the first upper flank and sliding in bores in the support.
- the return member reminding the first upper flank at a distance from the support is a gas spring or a helical spring.
- the folding device further comprises:
- a third matrix comprising an imprint corresponding to the shape of one of the corrugations to be formed, parallel to the imprints of the first and second matrices; the first die being disposed between the second and third dies, the third die being slidably mounted on the lower frame in a direction transverse to the direction of the undulations to be formed between a spaced apart position and a close position of the first die, said third die being returned to its position separated by a return member; and
- a third punch parallel to the first and second punches, carried by the upper frame, above the third die; the third punch being intended to engage inside the third die when the upper frame moves from its rest position to its folding position and being slidably mounted on the upper frame transversely to the direction of the corrugations to be formed between a spaced position and a close position of the first punch, said third punch being returned to its position spaced by a return member.
- Folding ispositif further comprises:
- a second lower flank mounted on the lower frame between the first and third dies, and having a bearing surface for receiving the metal sheet;
- the second lower flank being slidably mounted on the lower frame in a direction transverse to the direction of the corrugations to be formed between a spaced apart position and a close position of the first die, the second lower flank being biased towards its separated position by a return member;
- a second upper flank clamp mounted on the upper frame between the first and third punches, above the second lower flank so as to clamp the metal sheet between the second upper flank and the second flank clamp; lower movement of the upper frame from its rest position to its folding position, the second upper flank being slidably mounted on the upper frame in a direction transverse to the direction of the corrugations to be formed between a spaced position and a position close to the first punch and returned to its position spaced by a return member;
- the folding device being arranged in such a way that, in operation, the displacement of the upper frame from its rest position to its folding position is able to cause a folding of the metal sheet between the first punch and the first die of such so that said metal sheet transmits a traction force to the second upper flank and the second lower flank which moves them from their spaced apart position to their close position.
- the folding device further comprises means for assisting the displacement of the second die and the second punch towards their close position. According to another embodiment, the folding device does not require specific actuating means to ensure the movement of the second punch and the second die.
- the assistance means comprise a jack cooperating with the second die or with the second punch and being arranged to assist the displacement of the second die and the second punch towards their close position when moving the upper frame of its rest position to its folding position.
- the assistance means comprise a cam follower and a cam, one of the cam follower and the cam being carried by the second die or the second punch and the other being carried by the follower. upper frame or the lower frame so that when moving the upper frame from its rest position to its folding position, the cam follower cooperates with the cam to assist the movement of the second die and the second punch to their position close.
- each of the first and second punches comprises a head comprising first and second portions having a V-shaped cross-section, the first and second portions being alternately arranged one after the other in the longitudinal direction of the corrugation to be formed; , each of the first and second portions having two sidewalls joining at a ridge zone so as to define the V-shaped cross section; the lateral faces of the first portions being arcuate with a convexity turned towards the first or the second matrix and the lateral faces of the second portions being flat.
- the first and second portions may be arranged directly following one another or be separated by a longitudinal transition portion.
- the crest zone of the second portions of the head protrudes downward beyond the crest zone of the first portions of the head.
- the head has at each of its two longitudinal ends a first portion.
- the first portions of the head have a substantially semi-elliptical shape.
- the second portions of the head have a triangular shape.
- each second portion of the head is separated from the first neighboring portions by a longitudinal transition portion.
- a longitudinal transition portion avoids a sudden change in the shape of the corrugation may weaken the metal sheet.
- each longitudinal transition portion consists of a free longitudinal space, that is to say of a void space in which the head does not comprise a surface capable of coming into contact with the sheet metal metal during the folding operation.
- each longitudinal transition portion comprises a V-shaped cross section and comprises two lateral faces joining at a ridge zone, the lateral faces and the ridge zone being inclined with respect to the longitudinal direction and joining the lateral faces and the crest zones of the second portion and the first adjacent portion.
- the longitudinal transition portions provide a gradual transition between the first portions and the second portions.
- the first matrix comprises first and second V-shaped portions alternately arranged one after the other and respectively having a shape complementary to the shape of the first and second portions of the first punch; the first portions of the first punch being intended to engage inside the first portions of the first die and the second portions of the first punch being intended to engage inside the second portions of the first die.
- the first and second portions of the first matrix may be arranged directly following one another or be separated by a longitudinal transition portion.
- the first die when the first die is equipped with a longitudinal transition portion, its length is substantially equal to that of the longitudinal portion of the head of the first punch.
- the invention also provides a method of using a folding device mentioned above, the use comprising:
- Such a method of using the folding device may in particular aim to simultaneously form at least two parallel corrugations in a metal sheet.
- the invention relates to a folding device for forming a corrugation in a metal sheet, the folding device comprising:
- an upper frame mounted vertically movable relative to the lower frame between a rest position and a folding position
- a matrix carried by the lower frame and having an imprint corresponding to the shape of the corrugation to be formed; a punch carried by the upper frame, above the die, the punch being intended to engage inside the imprint of the die when the upper frame moves from its rest position to its folding position in order to press the metal sheet
- the matrix comprises two lateral elements and a central element; the lateral elements each having a lateral portion of the cavity of the matrix and the central element comprising a central portion of the cavity of the matrix, the central element being mounted vertically movable, between the lateral elements, between an upper position and a lower position and returned to its upper position by a return member so that, in operation, the displacement of the upper frame from its rest position to its folding position is able to clamp the metal sheet between the punch and the central element of the matrix and moving the central element from its upper position to its lower position.
- the invention relates to a folding device for forming at least one corrugation in a metal sheet, the folding device comprising:
- An upper frame mounted vertically movable relative to the lower frame between a rest position and a folding position;
- the first punch carried by the upper frame above the first die and intended to engage inside the impression of the first die when the upper frame moves from its rest position to its position folding so as to press the metal sheet;
- the first punch comprising a head comprising first and second portions having a V-shaped cross section, the first and second portions being arranged alternately one after the other in the longitudinal direction of the corrugation to be formed, each of first and second portions having two sidewalls joining at a crest zone so as to define the cross section V-shaped; the side faces of the first portions being arcuate with a convexity turned towards the first die and the side faces of the second portions being flat.
- FIG. 1 is a view of a corrugated metal sheet for the construction of a sealed membrane of a liquefied natural gas storage tank.
- FIG. 2 is a perspective view of a folding device for forming three parallel corrugations in a metal sheet.
- Figure 3 is a front view of the folding device, in a high position of rest.
- FIG. 4 is a view of an upper sidewall clamp and its support, in section along plane IV-IV illustrated in FIG.
- FIG. 5 is a view of an upper flank and its support, in section along the plane V-V illustrated in FIG. 3.
- FIG. 6 is a partial view, in section along the plane VI-VI of the device of FIG. 2, illustrating a return member of a lower flank.
- Figure 7 is a partial sectional view along the plane VII-VII of the device of Figure 2, illustrating a return member of a lateral die.
- Figure 8 is a front view of the folding device in an intermediate position of contact with the metal sheet.
- Figure 9 is a front view of the folding device in a folding position of the metal sheet, end of stroke.
- FIG. 11 schematically illustrates the section of the punch in zone XI of FIG.
- FIG. 12 schematically illustrates the section of the punch in zone XII of FIG.
- Fig. 13 is a detailed view of a corrugated metal sheet at a cross between high and low.
- Figure 14 is a front view of a folding device according to a second embodiment.
- Figure 15 is a front view of a folding device according to a third embodiment.
- FIG. 1 illustrates a corrugated metal sheet 1 intended for the formation of a sealed membrane of a tank for storing a cryogenic fluid, such as liquefied natural gas.
- the metal sheet 1 comprises a first series of parallel corrugations 2, said low, extending in a direction y and a second series of parallel corrugations 3, said high, extending in a direction x.
- the x and y directions of the series of undulations are perpendicular.
- the corrugations 2, 3 are projecting on the side of the internal face of the metal sheet 1, intended to be placed in contact with the fluid contained in the tank.
- the edges of the metal sheet 1 are here parallel to the corrugations 2, 3.
- the terms "high” and "low” have a relative meaning and mean that the undulations 2, said low, have a height lower than the undulations 3, say high.
- the metal sheet 1 comprises between the corrugations 2, 3, a plurality of flat surfaces 4. At each crossing between a low corrugation 2 and a high corrugation 3, the metal sheet 1 comprises a node zone 5.
- the node zone 5 comprises a central portion 6 having an apex projecting towards the inside of the tank. Moreover, the central portion 6 is bordered, on the one hand, by a pair of concave corrugations 7 formed in the crest of the high corrugation 3 and, on the other hand, by a pair of recesses 8 into which the low ripple 2.
- the corrugations 2, 3 of the metal sheet 1 allow the waterproofing membrane to be flexible in order to be deformed under the effect of thermal and mechanical stresses generated by the liquefied natural gas stored in the tank.
- the metal sheet 1 may in particular be made of stainless steel, aluminum, Invar ®: that is to say an alloy of iron and nickel whose expansion coefficient is typically between 1, 2.10 “6 and 2.10 " 6 K “1 , or in an iron alloy with a high manganese content whose expansion coefficient is typically of the order of 7 ⁇ 10 -6 K -1 .
- Invar ® that is to say an alloy of iron and nickel whose expansion coefficient is typically between 1, 2.10 "6 and 2.10 " 6 K “1 , or in an iron alloy with a high manganese content whose expansion coefficient is typically of the order of 7 ⁇ 10 -6 K -1 .
- Invar ® that is to say an alloy of iron and nickel whose expansion coefficient is typically between 1, 2.10 “6 and 2.10 " 6 K “1 , or in an iron alloy with a high manganese content whose expansion coefficient is typically of the order of 7 ⁇ 10 -6 K -1 .
- other metals or alloys is also conceivable.
- the metal sheet 1 has a thickness of about 1.2 mm. Other thicknesses are also conceivable, knowing that a thickening of the metal sheet 1 causes an increase in its cost and generally increases the rigidity of the corrugations 2, 3.
- FIGS. 2 to 9 show a folding device 9 making it possible to simultaneously form several high corrugations 3 in such a metal sheet 1, prior to the formation of the low corrugations 2.
- the "longitudinal" orientation of the folding device 9 is directed parallel to the longitudinal directions of the corrugations 3 to form and the "transverse” orientation is directed transversely to the longitudinal directions of the corrugations 3 to form.
- the folding device 9 comprises a lower frame 10 and an upper frame 11 mounted vertically movable relative to the lower frame 10.
- the upper frame 11 is movable, relative to the lower frame 10, between a high rest position and a folding position. of the metal sheet 1 in which it is deformed to form the undulations 3.
- the upper frame 1 1 is thus able to exert on the metal sheet 1 a pressure allowing its folding and the formation of the corrugations 3.
- the upper frame 11 is shown, in its rest position, in FIG. 3 and in its folding position, at the end of travel, in FIG. 9.
- the upper frame 11 is also shown in FIG. 8 in an intermediate position just before that begins the formation of the undulations 3.
- the folding device 9 comprises three punches 12, 13, 14 extending parallel to each other. Other, carried by the upper frame 11. Each punch 12, 13, 14 is disposed above a respective die 15, 16, 17, carried by the lower frame 10. Each punch 12, 13, 14 is intended for s engaging inside the imprint of its respective die 15, 16, 17, when the upper frame 11 moves from its rest position to its folding position, in order to press the metal sheet 1 between the punch 12, 13, 14 and its matrix 15, 16, 17 respectively and thus form the corrugations 3 in the metal sheet 1.
- Each punch 12, 13, 14 has, at its lower end, a head 18 having a shape corresponding to the shape of the corrugation to be shaped.
- the head 18 has a portion whose section has a V shape.
- the head 18 also has two lateral flanges 19, 20 bordering the V-shaped section and straightening towards the horizontal.
- the head 18 extends over a length substantially equal to the longitudinal dimension of the metal sheet 1 to be folded.
- the central punch 13 is fixed relative to the upper frame 11.
- the lateral punches 12, 14, arranged on either side of said central punch 13, are, for their part, slidably mounted on the upper frame 11 in a horizontal direction cross.
- the lateral punches 12, 14 are movably mounted on the upper frame 11 between a spaced apart position and a close position of the central punch 13.
- the lateral punches 12, 14 are each equipped with one or more trolleys 21 which are each mounted on an associated guide rail 22, carried by the upper frame 11.
- the carriages 21 are advantageously bearing carriages which comprise a plurality of rolling bodies adapted to cooperate with raceways carried by the associated guide rail 22.
- Returning members provide a return of the lateral punches 12, 14 to their position away from the central punch 13.
- the upper frame 11 is equipped with stop members 23 to limit the stroke of the lateral punches 12 , 14 relative to the central punch 13 and thus to define the spaced apart positions of the lateral punches 12, 14 relative to the upper frame 11.
- stop members 23 will be described in more detail later.
- the three matrices 15, 16, 17 carried by the lower frame are each able to define a cavity having a shape complementary to their respective punch 12, 13, 14.
- One of the matrices: the central matrix 16, is fixed by relative to the lower frame 10.
- the lateral dies 15, 17 which are arranged on either side of the central die 16 are, for their part, slidably mounted on the lower frame 10 in a transverse horizontal direction.
- the lateral dies 15, 17 are thus slidably mounted on the lower frame 10 between a spaced apart position and a close position of the central die 16.
- the lateral dies 15, 17 are equipped with one or more trolleys 24 which are each mounted on an associated guide rail 25 carried by the lower frame 10.
- the carriages 24 are preferably bearing carriages, as mentioned above.
- the lateral dies 15, 17 each cooperate with return members 26 which will be described in detail later, to recall the side matrices 15, 17 to their spaced apart position.
- the lower frame is equipped with stop elements 27 making it possible to limit the stroke of the lateral matrices 15, 17 with respect to the central matrix 16 and thus making it possible to define their spaced position relative to the lower frame 10.
- Each of the matrices 15, 16, 17 comprises two lateral elements 28, 29 and a central element 30 slidably mounted between the lateral elements 28, 29, between an upper position, illustrated in FIG. 3, and a lower position, illustrated in FIG. 9.
- the lateral elements 28, 29 each define a lateral portion of the cavity.
- the lateral elements 28, 29 further comprise a horizontal upper support surface 31, 32, bordering the cavity, arranged opposite the lateral flanges 19, 20 of the head 18 of the punch 12, 13, 14 facing each other. to face.
- the central element 30 carries a central portion of the impression.
- the central element 30 is returned to its upper position by a return member.
- the return member is, for example, a cylinder or gas spring 33 or a helical spring housed between the lateral elements 28, 29.
- the folding device 9 is equipped with clamps 34, 35, 36, 37 to maintain the metal sheet 1 to ensure that it remains in position, during its folding.
- the folding device 9 comprises two lower flanks 36, 37 mounted on the lower frame 10 and two upper flanks 34, 35 mounted on the upper frame 11.
- the two lower flanks 36, 37 are arranged on each side. other of the central matrix 16, and are each placed between said central matrix 16 and one of the two lateral matrices 15, 17.
- the two upper flanks 34, 35 are respectively disposed above one and the other of said lower flanks 36, 37.
- the two upper flanks thus extend, on both sides of the central punch 13 and are each placed between the central punch 13 and one of the side punches 12, 14.
- the lower flanks 36, 37 comprise a flat bearing surface for receiving the metal sheet 1.
- the flanks the upper plates 34, 35 each have a flat clamping surface arranged such that when the upper frame 11 is moved to its folding position, the metal sheet 1 is sandwiched between the flat bearing surfaces of the lower flanks. 36, 37 and the clamping surfaces of the upper flanks 34, 35 to hold the metal sheet 1.
- the upper flanks 34, 35 are slidably mounted on the upper frame 11 in the transverse horizontal direction between a spaced apart position and a close position of the central punch 13.
- the lower flanks 36, 37 are slidably mounted on the lower frame 10, in a transverse horizontal direction, between a spaced apart position and a close position of the central die 16.
- the flanks 34, 35, 36, 37 are slidably mounted via a or several carriages 38, 39 which are slidably mounted on an associated guide rail 22, 25.
- the guide rails 22 of the upper sidewall clamps 34, 35 are fixed on the upper frame 11 while the guide rails 25 of the clamps lower flanges 36, 37 are fixed on the lower frame 10.
- common guide rails 22, 25 ensure both the guiding of a lateral punch 12, 14 or a lateral matrix 15, 17 and an upper sidewall clamp 34, 35 or lower 36, 37.
- the folding device 9 is equipped with return members 45 for recalling the lower flanks 36, 37 to their spaced position and return members, not shown, for recalling the upper flanks 34, 35 to their position aside.
- the upper flanks 34, 35 are each slidably mounted on the upper frame 11 via a support 40 equipped with one or more trolleys 38 slidably mounted on one or more guide rails 22 carried by the upper frame 1 1.
- each upper sidewall clamp 34, 35 is slidably mounted vertically on a support 40 via a guiding device comprising a plurality of guide tubes 41 secured to said upper sidewall clamp 35 and slidably mounted in bores 42 formed. in the support 40.
- the guide tubes 41 comprise a first end which is fixed to the upper sidewall clamp 35 and a second end fixed to a retaining plate 43 having a dimension greater than the diameter of the bore 42 formed in the support 40, so as to retain the upper flank 35 relative to its support 40.
- one or more return members exert an elastic force between each upper flank 34, 35 and the associated support 40, tending to push the upper flank 34, 35 towards the lower frame 10.
- the return members are gas cylinders 44, also called gas springs, which are, on the one hand, fixed to the support 40 and, on the other hand, fixed to the upper sidewall clamp 34, 35.
- the gas cylinders 44 may be replaced by coil springs.
- FIG. 6 illustrates a return member 26 making it possible to recall a lateral matrix 15 towards its position spaced from the central matrix 16.
- the return member 26 is here a helical spring which has a first end in abutment, against an element of support 46, fixed to the lower frame 10, and a second end bearing against the lateral matrix 15.
- the bearing element 46 and the lateral die 15 each comprise a blind hole 47, 48 for housing the ends of the spring.
- each lateral matrix 15 is biased towards its position separated by a plurality of return members, thus arranged.
- each lateral matrix 15 cooperates with one or more stop elements 27, arranged along the lateral edges of the lower frame 10, in order to limit the stroke of the lateral matrix 15 with respect to the lower frame 10.
- FIG. 7 illustrates a return member 45 making it possible to return a bottom flange 36 to its position spaced from the central matrix 16.
- the return member 45 is a helical spring which has a first end resting against a fixed element relative to the lower frame 10, here a lower portion of the central die 16, and a second end bearing against the lower side clamp 36.
- the coil spring is partly housed in a blind hole 49 formed in the lower flank 36.
- each lower flange 36 is biased towards its spaced position by a plurality of return members, thus arranged.
- the lower sidewall clamp 36 has a plurality of lateral lugs 50 projecting laterally outwardly of the lower frame 10 and passing between the lower frame 10 and the adjacent lateral matrix 15 so as to allow said lateral lugs 50 to abut. against the stop elements 51, arranged along the lateral edges of the lower frame 10, when the lower flank 36 is in its spaced apart position.
- each abutment member 27, 51 comprises a flange 52 attached to the lower frame 10, provided with a threaded bore, and a threaded screw 52, cooperating with the threaded bore, and whose end 53 constitutes the surface stop.
- the return members, not shown, of the lateral punches 12, 14 and the upper flanks 34, 35 are arranged in a substantially identical manner to the return members 26, 45, illustrated in FIGS. 6 and 7. likewise, the abutment members 23 making it possible to limit the stroke of the lateral punches 12, 14 and the upper flanks 34, 35 have a structure identical to the abutment elements 27, 51.
- the return members 26, 45 of the side matrices 15, 17, flanks 34, 35, 36, 37 and / or lateral punches 12, 14 are gas cylinders.
- the metal sheet 1 is put in place while the upper frame 1 1 is in its rest position.
- the metal sheet 1 rests against the bearing surfaces of the lower flanks 36, 37, against the upper horizontal bearing surfaces 31, 32 of the lateral elements 28, 29 of the matrices 15, 16, 17 and against the upper end. of the central element 30 of the matrices 15, 16, 17.
- the side punches 12, 14, the side matrices 15, 17 and the upper sidewall clamps 34, 35 and lower 36, 37 are positioned in their spaced apart position.
- the upper frame 11 is then moved towards its folding position, to an intermediate position, illustrated in FIG. 8, in which the upper flanks 34, 35 press the metal sheet 1 against the bearing surfaces of the lower flanks 36, 37.
- the punches 12, 13, 14 also come into contact with the metal sheet 1.
- the metal sheet 1 is clamped between each punch 12, 13, 14 and the central element 30 of the die 15, 16, 17 vis-à- screw. Therefore, when the punches 12, 13, 14 exert a forming force on the metal sheet 1, the central elements 30 of the matrices 15, 16, 17 slide down between the two lateral elements 28, 29 of their respective matrix, towards their lower position. Furthermore, the metal sheet 1, deformed under the effect of the punches 12, 13, 14 exerts a tensile force on the flanks 34, 35, 36, 37, on the side punches 12, 14 and on the dies 15, 17 so that they move to their close position.
- the upper frame 11 is raised towards its rest position to release the corrugated metal sheet 1. Therefore, the lateral dies 15, 17, the side punches 12, 14 and the flanks 34, 35, 36, 37 return directly to their spaced position under the effect of the return members 26, 45 and the central elements 30 matrices 15, 16, 17 return to their upper position under the effect of the return member 33.
- Such a folding device 9 can simultaneously form several corrugations in a metal sheet, in a single press stroke, and this without changing the thickness of the metal sheet 1.
- a punch 54 is observed according to an alternative embodiment.
- a folding device 9 for simultaneously forming a plurality of corrugations as described above is capable of being equipped with such punches 54.
- such a punch 54 is also capable of equipping other folding devices, and in particular folding only to achieve one ripple at a time.
- the punch 54 has a head 57 which comprises an alternation of first portions 55 and second portions 56.
- the first portions 55 and the second portions 56 are aligned in the longitudinal direction of the corrugation to be formed and are arranged alternately in said longitudinal direction .
- the two longitudinal ends of the head 57 are formed by first portions 55.
- the cross-section of a first portion 55 and the cross-section of a second portion 56 are respectively observed.
- the section cross-section has a shape of V which is defined by two lateral faces 55a, 55b, 56a, 56b joining at a ridge zone 55c, 56c.
- the head also has two lateral flanges 19, 20 bordering the V-shaped section and straightening towards the horizontal.
- the first portions 55 have substantially a semi-elliptical section.
- the two lateral portions 55a, 55b are thus arched.
- This shape of the first portions corresponds to the final shape that it is desired to give to the high corrugations 3 in the zones A separating two zones of successive nodes (see FIG. 13). Such a shape makes it possible to confer on the membrane 1 excellent characteristics of mechanical strength.
- the second portions 56 have substantially a triangular shape. In other words, their cross section is defined by two substantially planar lateral faces 56a, 56b joining at a ridge zone 56c. Peak zone 56c presents a leave.
- the transverse dimension of the cross-section of the second portions 56 is substantially equal to that of the first portions 55. As shown in FIG. 10, the crest zones 56c of the second portions 56 extend downward beyond the crest 55c of the first portions 55.
- the geometry of the first portions makes it possible to form the high corrugation 3 in the zones B intended to form the node zones 5 at each crossing between a low corrugation 2 and a high corrugation 3 when the low corrugations 2 are subsequently formed.
- the geometry of the second portions 56 is particularly adapted to give the high corrugation 3 a geometry that allows it to be subsequently folded in a direction perpendicular to its longitudinal direction and thus allow the formation of the low undulations and the node zones. having concave corrugations 7 and recesses 8.
- the matrix, not shown, intended to receive such a punch 54 during movement of the upper frame 1 1 to its folding position has a geometry adapted accordingly.
- such a matrix also comprises an alternation of first portions having a shape complementary to that of the first portions 55 of the head punch and second portions having a shape complementary to that of the second portions 57 of the punch head.
- Such an arrangement of matrix and punch having an alternation of different shaped portions makes it possible during a same folding step: to conform the high undulations 3, that is to say to give them their final shape, in the areas that are not intended to be reworked later to form a node area, and
- This arrangement therefore makes it possible to limit the number of folding steps necessary for the formation of a metal sheet having two perpendicular series of corrugations.
- each second portion 56 of the head is separated from the first portions 55 adjacent by a longitudinal portion of transition.
- the length of the longitudinal transition portion is typically between a few millimeters and 2 centimeters.
- the longitudinal transition portions are free spaces, that is to say gaps between the first and second portions 55, 56 in which the head has no surfaces that can come into contact with the metal sheet during the folding operation.
- the die intended to receive such a punch comprises corresponding longitudinal portions formed of empty space between each of its second portions and the first adjacent portions.
- the longitudinal transition portions have a V-shaped section and comprise two lateral faces joining at a ridge zone.
- the head does not have a uniform section. Indeed, the lines of each of the side walls and the ridge zone which have a longitudinal component are inclined with respect to the longitudinal direction so that the transition between the first and the second portions takes place with a slight slope.
- the die intended to receive such a punch comprises longitudinal portions having a shape corresponding to that of the longitudinal transition portions of the head between each of its second portions and the first adjacent portions.
- the folding device is equipped with means for assisting the displacement of lateral punches 12, 14 and lateral matrices 15, 17 towards their close position.
- the folding device may further comprise means for assisting the movement of the upper flanks 34, 35 and the lower flanks 36, 37 towards their close position.
- Such assistance means are particularly advantageous in that they make it possible, in particular, to ensure that the lateral punches 12, 14 and the lateral matrices 15, 17, and optionally the upper sidewall clamps 34, 35 and lower 36, 37 move. over their entire stroke, that is to say until their close final position, when moving the upper frame 11 to its folding position.
- the assistance means comprise one or more jacks 58, such as pneumatic jacks for example, capable of assisting the displacement of the lateral dies 15, 17 from their spaced apart position to their close position. .
- each cylinder 58 comprises a body 69 which is fixed on the lateral matrix 17 and a rod 59 which passes through the three matrices 15, 16, 17 and the lower sidewall clamps 36, 37.
- one of the ends 64 of the rod 59 cooperates with a nut 64 which is mounted on said end 64 and is adapted to cooperate with the other lateral matrix 15 in order to move it towards its close position when the rod 59 moves relative to the body 69 of the cylinder.
- Each jack 58 is thus able to exert on the two lateral matrices 15,
- each jack 58 is therefore able to assist the displacement of the lateral matrices 15, 17 from their spaced apart position to their close position.
- each cylinder 58 passes through the body 69 of the cylinder so that the two ends 66, 67 of the rod extend respectively on either side of the body 69.
- the folding device comprises a plurality of cylinders, as in Figure 14, the second ends 67 of the cylinders 58 are secured to each other via an intermediate plate 65 so as to allow synchronization of the movement of the jacks 58.
- first series of cylinders which are each, on the one hand fixed on the lower frame 10 and on the other hand fixed on one or the other.
- other lateral dies 15, 17 which thus make it possible to exert an assisting force tending to move the lateral dies 15, 17 towards their close position by resting on the lower frame 10.
- the assistance means comprise alternately or complementary to the aforementioned cylinders, one or more pneumatic cylinders, not shown, which cooperate with one and the other of the two side punches 12 , 14 to assist their movement from their spread position to their close position.
- the folding device further comprises one or more additional cylinders (not shown) which cooperate respectively with one and the other of the two lower flanks 36, 37 or with both of the upper flanks 34, 35.
- the assistance means comprise two cams 60, 61 each cooperating with a cam follower 62, 63.
- Each lateral die 15, 17 is equipped with a cam follower 62, 63 adapted to cooperate with a respective cam surface 60, 61 carried by the upper frame 11 as it moves downward, from its rest position to its folding position.
- the cam followers 62, 63 are advantageously rollers mounted idly about a horizontal axis, parallel to the direction of the undulations to be formed.
- the cam surfaces 60, 61 are oriented such that when the upper frame 11 moves from its rest position to its folding position, the cam surface 60, 61 bears against the cam follower 62, 63 moving the lateral dies 15, 17 to their close position.
- the cams 60, 61 and follower cams 62, 63 are arranged in such a way that they do not intervene as soon as the punches 12, 13, 14 come into contact with the portion of the metal sheet to fold but later upon movement of the punches 2, 13, 14 to their final fold position.
- the cams 60, 61 can also be arranged in such a way that the cam followers only come into contact with the cams 60, 61 so as to assist the movement of the lateral matrices 15, 17 only in the event that the kinematics of said lateral matrices 15, 17 have a slight delay with respect to the desired kinematics.
- each lateral punch 12, 14 is equipped with a follower. cam or cam, adapted to cooperate with a cam or cam follower carried by the lower frame when the upper frame moves downwards towards its folding position.
- the folding device further comprises, in addition to said cams and cam followers, cam and cam follower means which make it possible to assist the movement of the two cams. lower flanks 36, 37 and the two upper flanks 34, 35 to their close position.
- each of the upper flanks 34, 35 or each of the lower flanks 36, 37 comprises a cam or a cam follower which cooperates with a cam follower or a cam carried by the upper frame 11 or lower 10 .
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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FR1458189A FR3025123B1 (fr) | 2014-09-02 | 2014-09-02 | Dispositif et procede de pliage pour former simultanement une pluralite d'ondulations dans une tole metallique |
FR2015050872 | 2015-04-03 | ||
PCT/FR2015/051277 WO2016034782A1 (fr) | 2014-09-02 | 2015-05-15 | Dispositif de pliage pour former simultanément une pluralité d'ondulations dans une tôle métallique et procédé d'utilisation du dispositif |
Publications (2)
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EP3194089A1 true EP3194089A1 (fr) | 2017-07-26 |
EP3194089B1 EP3194089B1 (fr) | 2018-06-06 |
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EP15732770.1A Active EP3194089B1 (fr) | 2014-09-02 | 2015-05-15 | Dispositif de pliage pour former simultanément une pluralité d'ondulations dans une tôle métallique et procédé d'utilisation du dispositif |
Country Status (5)
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US (1) | US10688549B2 (fr) |
EP (1) | EP3194089B1 (fr) |
KR (1) | KR102313896B1 (fr) |
CN (1) | CN107073540B (fr) |
WO (1) | WO2016034782A1 (fr) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3057185B1 (fr) * | 2016-10-06 | 2018-11-16 | Gaztransport Et Technigaz | Machine de pliage pour former une ondulation dans une tole metallique |
FR3057184B1 (fr) * | 2016-10-06 | 2018-11-16 | Gaztransport Et Technigaz | Machine de pliage pour former une ondulation dans une tole metallique |
FR3061046B1 (fr) * | 2016-12-23 | 2019-05-24 | Gaztransport Et Technigaz | Dispositif de pliage pour former une ondulation dans une tole metallique et procede d'utilisation dudit dispositif |
CN107716675B (zh) * | 2017-11-06 | 2023-08-11 | 无锡先导智能装备股份有限公司 | 折边组件、折弯装置及折弯方法 |
FR3077278B1 (fr) * | 2018-02-01 | 2020-02-07 | Gaztransport Et Technigaz | Paroi etanche a membrane ondulee renforcee |
KR102050264B1 (ko) * | 2018-06-15 | 2019-12-02 | (주)호원 | 금형장치 |
CN109482680A (zh) * | 2018-11-30 | 2019-03-19 | 宁波凯荣船用机械有限公司 | 薄膜型液化天然气液货舱维护系统不锈钢波纹板大波纹制作设备及制作工艺 |
CN109591964B (zh) * | 2018-11-30 | 2020-03-24 | 宁波凯荣船用机械有限公司 | 薄膜型液化天然气液货舱维护系统不锈钢波纹板压肩工艺 |
CN109482725A (zh) * | 2018-11-30 | 2019-03-19 | 宁波凯荣船用机械有限公司 | 薄膜型液化天然气液货舱维护系统不锈钢波纹板生产线及制作工艺 |
CN110293156A (zh) * | 2019-04-22 | 2019-10-01 | 南京联众工程技术有限公司 | 用于夹持波纹钢板的夹具及采用其折弯波纹钢板的方法 |
KR20220045967A (ko) * | 2019-08-09 | 2022-04-13 | 가즈트랑스포르 에 떼끄니가즈 | 패널간 단열하는 인서트들을 가진 밀봉되고 열적으로 단열하는 탱크의 벽을 제조하는 방법 |
KR102298543B1 (ko) * | 2020-04-09 | 2021-09-06 | 경성산업(주) | Lng 화물창 모서리 프레임 제조장치 |
CN112170584B (zh) * | 2020-12-02 | 2021-06-04 | 朱长亮 | 一种用于在金属板中形成波纹的弯曲起皱装置 |
CN115026519B (zh) * | 2022-07-01 | 2023-12-12 | 江西宏成铝业有限公司 | 一种增强铝合金制备方法 |
CN117718373A (zh) * | 2024-02-18 | 2024-03-19 | 中太(苏州)氢能源科技有限公司 | 金属板的纵向波纹的加工装置 |
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IL75231A (en) * | 1985-05-19 | 1987-08-31 | Koor Metals Ltd | Sheet bending apparatus |
US4635462A (en) * | 1985-09-26 | 1987-01-13 | Diversified Manufacturing Corporation | Corrugating die shoe assemblies |
US5200013A (en) * | 1990-12-18 | 1993-04-06 | Dividella Ag | Method and device for corrugated deformation of a flat material sheet |
JP2602127B2 (ja) * | 1991-02-08 | 1997-04-23 | 熊太郎 松長 | 深溝波形多重曲プレス装置 |
US6834525B2 (en) * | 2002-11-18 | 2004-12-28 | The Boeing Company | Adjustable corrugation apparatus and method |
KR101410285B1 (ko) | 2007-04-04 | 2014-06-20 | 정동욱 | 일 방향 압력 롤러를 구비한 액화천연가스 저장탱크용멤브레인 성형장치 |
KR100766309B1 (ko) | 2007-04-30 | 2007-10-12 | (주)삼우멤코 | 성형용 멤브레인 탑재대가 연결된 액화천연가스 저장탱크용멤브레인 성형장치 |
US8950231B2 (en) * | 2010-03-17 | 2015-02-10 | Sukup Manfucaturing Co. | Support for a grain bin floor and method of making the same |
CN102716946B (zh) * | 2012-06-18 | 2014-07-02 | 天津力神电池股份有限公司 | 折弯装置 |
NL1040017C2 (nl) * | 2013-01-23 | 2014-07-24 | Utior Las En Constructiebedrijf | Inrichting en werkwijze voor het vervaardigen van een geprofileerde metalen plaat, geprofileerde metalen platen en constructiedeel. |
KR101322977B1 (ko) * | 2013-05-08 | 2013-10-29 | 주식회사 티엠씨 | 액화천연가스 저장탱크용 멤브레인 시트의 제작 장치 및 방법 |
-
2015
- 2015-05-15 US US15/506,278 patent/US10688549B2/en active Active
- 2015-05-15 KR KR1020177008228A patent/KR102313896B1/ko active IP Right Grant
- 2015-05-15 WO PCT/FR2015/051277 patent/WO2016034782A1/fr active Application Filing
- 2015-05-15 CN CN201580058682.4A patent/CN107073540B/zh active Active
- 2015-05-15 EP EP15732770.1A patent/EP3194089B1/fr active Active
Also Published As
Publication number | Publication date |
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EP3194089B1 (fr) | 2018-06-06 |
CN107073540A (zh) | 2017-08-18 |
US20170252790A1 (en) | 2017-09-07 |
KR102313896B1 (ko) | 2021-10-18 |
US10688549B2 (en) | 2020-06-23 |
KR20170047330A (ko) | 2017-05-04 |
WO2016034782A1 (fr) | 2016-03-10 |
CN107073540B (zh) | 2019-04-05 |
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